From 57045df5fe3ec557e57dc7434ac1a07b5521bffc Mon Sep 17 00:00:00 2001 From: Guenter Geiger Date: Mon, 29 Jul 2002 17:06:19 +0000 Subject: This commit was generated by cvs2svn to compensate for changes in r58, which included commits to RCS files with non-trunk default branches. svn path=/trunk/; revision=59 --- pd/portaudio/pablio/test_rw_echo.c | 123 +++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 pd/portaudio/pablio/test_rw_echo.c (limited to 'pd/portaudio/pablio/test_rw_echo.c') diff --git a/pd/portaudio/pablio/test_rw_echo.c b/pd/portaudio/pablio/test_rw_echo.c new file mode 100644 index 00000000..9b27e3c2 --- /dev/null +++ b/pd/portaudio/pablio/test_rw_echo.c @@ -0,0 +1,123 @@ +/* + * $Id: test_rw_echo.c,v 1.1.1.1 2002-07-29 17:06:17 ggeiger Exp $ + * test_rw_echo.c + * Echo delayed input to output. + * + * Author: Phil Burk, http://www.softsynth.com/portaudio/ + * + * This program uses PABLIO, the Portable Audio Blocking I/O Library. + * PABLIO is built on top of PortAudio, the Portable Audio Library. + * + * Note that if you need low latency, you should not use PABLIO. + * Use the PA_OpenStream callback technique which is lower level + * than PABLIO. + * + * For more information see: http://www.audiomulch.com/portaudio/ + * Copyright (c) 1999-2000 Ross Bencina and Phil Burk + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files + * (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, + * publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * Any person wishing to distribute modifications to the Software is + * requested to send the modifications to the original developer so that + * they can be incorporated into the canonical version. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF + * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + */ + +#include +#include +#include +#include "pablio.h" +#include + +/* +** Note that many of the older ISA sound cards on PCs do NOT support +** full duplex audio (simultaneous record and playback). +** And some only support full duplex at lower sample rates. +*/ +#define SAMPLE_RATE (22050) +#define NUM_SECONDS (20) +#define SAMPLES_PER_FRAME (2) + +/* Select whether we will use floats or shorts. */ +#if 1 +#define SAMPLE_TYPE paFloat32 +typedef float SAMPLE; +#else +#define SAMPLE_TYPE paInt16 +typedef short SAMPLE; +#endif + +#define NUM_ECHO_FRAMES (2*SAMPLE_RATE) +SAMPLE samples[NUM_ECHO_FRAMES][SAMPLES_PER_FRAME] = {0.0}; + +/*******************************************************************/ +int main(void); +int main(void) +{ + int i; + PaError err; + PABLIO_Stream *aInStream; + PABLIO_Stream *aOutStream; + int index; + + printf("Full duplex sound test using PABLIO\n"); + fflush(stdout); + + /* Open simplified blocking I/O layer on top of PortAudio. */ + /* Open input first so it can start to fill buffers. */ + err = OpenAudioStream( &aInStream, SAMPLE_RATE, SAMPLE_TYPE, + (PABLIO_READ | PABLIO_STEREO) ); + if( err != paNoError ) goto error; + /* printf("opened input\n"); fflush(stdout); /**/ + + err = OpenAudioStream( &aOutStream, SAMPLE_RATE, SAMPLE_TYPE, + (PABLIO_WRITE | PABLIO_STEREO) ); + if( err != paNoError ) goto error; + /* printf("opened output\n"); fflush(stdout); /**/ + + /* Process samples in the foreground. */ + index = 0; + for( i=0; i<(NUM_SECONDS * SAMPLE_RATE); i++ ) + { + /* Write old frame of data to output. */ + /* samples[index][1] = (i&256) * (1.0f/256.0f); /* sawtooth */ + WriteAudioStream( aOutStream, &samples[index][0], 1 ); + + /* Read one frame of data into sample array for later output. */ + ReadAudioStream( aInStream, &samples[index][0], 1 ); + index += 1; + if( index >= NUM_ECHO_FRAMES ) index = 0; + + if( (i & 0xFFFF) == 0 ) printf("i = %d\n", i ); fflush(stdout); /**/ + } + + CloseAudioStream( aOutStream ); + CloseAudioStream( aInStream ); + + printf("R/W echo sound test complete.\n" ); + fflush(stdout); + return 0; + +error: + fprintf( stderr, "An error occured while using PortAudio\n" ); + fprintf( stderr, "Error number: %d\n", err ); + fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); + return -1; +} -- cgit v1.2.1